package com.itheima.reggie.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;


/**
 * 全局异常处理
 *
 * @ControllerAdvice 默认拦截所有 Controller 发出的异常
 * @RestControllerAdvice 默认拦截所有 RestController 发出的异常，并且具有 @ResponseBody
 * @ResponseBody 将方法返回的数据转换为json字符串给到响应体输出。
 */
// @ControllerAdvice(annotations = {RestController.class, Controller.class})
// @ResponseBody
//另一种方式
@RestControllerAdvice(annotations = {RestController.class, Controller.class})
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 数据库中实体数据已存在异常处理方法
     *
     * @return
     */
    @ExceptionHandler(SQLIntegrityConstraintViolationException.class)
    public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex) {
        log.error(ex.getMessage());
        if (ex.getMessage().contains("Duplicate entry")) {
            String[] split = ex.getMessage().split(" ");
            String msg = split[2] + "已存在";
            return R.error(msg);
        }
        return R.error("未知错误");
    }

    /**
     * 删除存在关联异常处理方法
     *
     * @return
     */
    @ExceptionHandler(CustomException.class)
    public R<String> exceptionHandler(CustomException ex) {
        log.error(ex.getMessage());
        return R.error(ex.getMessage());
    }
}
